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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 7851. |
Fertilizin is a chemical substance produced from [CBSE PMT 1997] |
| A. | Mature eggs |
| B. | Acrosome |
| C. | Polar bodies |
| D. | Middle piece of sperm |
| Answer» B. Acrosome | |
| 7852. |
When sex is determined at the time of fertilization, it is known as |
| A. | Progamic |
| B. | Syngamic |
| C. | Epigamic |
| D. | All the above |
| Answer» C. Epigamic | |
| 7853. |
In sexually reproducing animals the union of male and female gamete forms a cell which is called [MP PMT 1995] |
| A. | Ovarian cell |
| B. | Oocyte |
| C. | Zygote |
| D. | Graafian follicle |
| Answer» D. Graafian follicle | |
| 7854. |
Normally the number of chromosomes in the nuclei of gametes that fuse at fertilization are [MP PMT 1995] |
| A. | Innumerable |
| B. | Dissimilar |
| C. | Similar |
| D. | None of the above |
| Answer» D. None of the above | |
| 7855. |
Double fertilisation results in the production of [J&K CET 2005] |
| A. | Haploid nucleus |
| B. | Diploid nucleus |
| C. | Triploid nucleus |
| D. | Tetraploid nucleus |
| Answer» D. Tetraploid nucleus | |
| 7856. |
When the pollen tube enters through the micropyle, it is termed as [Manipal MEE 1995; CPMT 1999; MHCET 2001] |
| A. | Chalazogamy |
| B. | Mesogamy |
| C. | Porogamy |
| D. | None of the above |
| Answer» D. None of the above | |
| 7857. |
Development of seed from an unfertilised egg is called [HP PMT 2005] |
| A. | Vivipary |
| B. | Parthenocarpy |
| C. | Apogamy |
| D. | Apospory |
| Answer» D. Apospory | |
| 7858. |
Function of gynogamone-I is |
| A. | Conserves sperm activity |
| B. | Dissolves vitelline membrane |
| C. | Neutralizes androgamone-I thereby increasing sperm activity |
| D. | Makes sperm head sticky to facilitate attachment of sperm to egg surface |
| Answer» D. Makes sperm head sticky to facilitate attachment of sperm to egg surface | |
| 7859. |
Which of the following is not true for double fertilization [BCECE 2005] |
| A. | Discovered by Nawaschin |
| B. | Male gamete and secondary nucleus fused to form Endosperm nucleus |
| C. | Endosperm nucleus is diploid |
| D. | Endosperm provide nutrition to embryo |
| Answer» D. Endosperm provide nutrition to embryo | |
| 7860. |
Female rabbit is |
| A. | Monoestrus |
| B. | Diestrus |
| C. | Polyestrus |
| D. | None of the above |
| Answer» D. None of the above | |
| 7861. |
Double fertilization involves [AIIMS 2005] |
| A. | Fertilization of the egg by two male gametes |
| B. | Fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube |
| C. | Fertilization of the egg and the central cell by two sperms brought by different pollen tubes |
| D. | Fertilization of the egg and the central cell by two sperms brought by the same pollen tube |
| Answer» E. | |
| 7862. |
A layer of cortical granules is found beneath the |
| A. | Vitelline membrane |
| B. | Fertilization cone |
| C. | Plasma membrane |
| D. | Hyaline layer |
| Answer» D. Hyaline layer | |
| 7863. |
Who demonstrated the acrosome reaction in Saccoglossus |
| A. | F.R. Lillie (1919) |
| B. | Colwin and Colwin (1967) |
| C. | [a] and [b] both |
| D. | None of the above |
| Answer» C. [a] and [b] both | |
| 7864. |
The pollen tube usually enters the embryo sac [AIIMS 2004; CPMT 2005] |
| A. | Through one of the synergids |
| B. | By directly penetrating the egg |
| C. | Between one synergid and central cell |
| D. | By knocking off the antipodal cells |
| Answer» D. By knocking off the antipodal cells | |
| 7865. |
Triple fusion is characteristic of [Kerala PMT 2004] |
| A. | Thallophytes |
| B. | Bryophytes |
| C. | Pteridophytes |
| D. | Gymnosperms |
| E. | Angiosperms |
| Answer» F. | |
| 7866. |
The animals which lay fertilized or unfertilized eggs and whole development takes place outside the body of mother are called |
| A. | Oviparous |
| B. | Viviparous |
| C. | Ovo-viviparous |
| D. | Herbivorous |
| Answer» B. Viviparous | |
| 7867. |
Triple fusion in angiosperm is the fusion of second sperm with [Orissa JEE 2004] |
| A. | Antipodal cell and one synergid cell |
| B. | Two antipodal cells |
| C. | Two synergid cells |
| D. | Two polar nuclei |
| Answer» E. | |
| 7868. |
Which one of the following events immediately follows the entry of a spermatozoan into an oocyte |
| A. | An increase in the permeability of the oocyte membrane |
| B. | An increase in activity of proteolytic enzymes |
| C. | A decrease in the metabolic rate of the oocyte |
| D. | Thickening of the vitelline membrane |
| Answer» E. | |
| 7869. |
Pollen tube discharge its gametes in [CPMT 2003; CBSE PMT 2003] |
| A. | Synergids |
| B. | Antipodals |
| C. | Central cell |
| D. | None of these |
| Answer» B. Antipodals | |
| 7870. |
In sperm bank the sperms are stored in test tubes for the purpose of artificial insemination |
| A. | Due to addition of certain chemicals |
| B. | Under extraordinary cold condition |
| C. | Under normal laboratory condition |
| D. | After washing with distilled water |
| Answer» C. Under normal laboratory condition | |
| 7871. |
Which of the following is without exception in angiosperms [CBSE PMT 2002] |
| A. | Secondary growth |
| B. | Presence of vessels |
| C. | Double fertilization |
| D. | Autotrophic nutrition |
| Answer» D. Autotrophic nutrition | |
| 7872. |
Fertilizins are the substances emitted from [BHU 1985] |
| A. | Mature egg |
| B. | Sperms |
| C. | Immature egg |
| D. | Polar body |
| Answer» B. Sperms | |
| 7873. |
Chalazogamy is found in |
| A. | Cucurbita |
| B. | Sunflower |
| C. | Casurina |
| D. | Boerhavia |
| Answer» D. Boerhavia | |
| 7874. |
Antifertilizins are contained in |
| A. | Spermatozoa |
| B. | Ovary |
| C. | Testis |
| D. | Germinal epithelium |
| Answer» B. Ovary | |
| 7875. |
Gyanogamones are secretions from |
| A. | Ovum or unfertilized egg |
| B. | Spermatids |
| C. | Cells of Graafian follicle |
| D. | Ovary |
| Answer» B. Spermatids | |
| 7876. |
The cell that divides to form two male nuclei in angiosperms is [MHCET 2001] |
| A. | Vegetative cell |
| B. | Generative cell |
| C. | Tube cell |
| D. | Antheridial cell |
| Answer» C. Tube cell | |
| 7877. |
Through which route the pollen tube enters the ovule [MP PMT 2001] |
| A. | Chalaza |
| B. | Micropyle |
| C. | Funiculus |
| D. | All of these |
| Answer» E. | |
| 7878. |
The primordial germ cells make their appearance from wall of |
| A. | Amnion |
| B. | Chorion |
| C. | Allantois |
| D. | Gonad |
| Answer» E. | |
| 7879. |
Growth of pollen tube towards embryo sac is [AIIMS 2000; CPMT 2003] |
| A. | Geotropism |
| B. | Thigmotaxis |
| C. | Chemotaxis |
| D. | Phototaxis |
| Answer» D. Phototaxis | |
| 7880. |
Function of fertilizin is/are |
| A. | Makes the sperm sticky |
| B. | Clumping of sperms |
| C. | Makes sperm to adhere the surface of egg |
| D. | All the above |
| Answer» E. | |
| 7881. |
In angiosperm, triple fusion is necessary for the formation of [CBSE PMT 1996] |
| A. | Seed coat |
| B. | Fruit wall |
| C. | Embryo |
| D. | Endosperm |
| Answer» E. | |
| 7882. |
The hormones of the sperm are called |
| A. | Gynogamones-I |
| B. | Androgamones |
| C. | Gynogamones-II |
| D. | None of these |
| Answer» C. Gynogamones-II | |
| 7883. |
The disadvantage of parthenogenesis is |
| A. | Establishment of polyploid generation |
| B. | Elimination of variety in population |
| C. | Means of reproduction |
| D. | Does not encourage the appearance of new and advantageous combinations of genes |
| Answer» E. | |
| 7884. |
Germination of pollen grain on the stigma is [JIPMER 1987; BVP 2003] |
| A. | Autogamy |
| B. | In vivo germination |
| C. | In vitro germination |
| D. | None of these |
| Answer» C. In vitro germination | |
| 7885. |
When more than one sperm establish contact and penetrate into the egg, then it is called |
| A. | Monospermy |
| B. | Polyspermy |
| C. | [a] and [b] both |
| D. | None of these |
| Answer» C. [a] and [b] both | |
| 7886. |
Double fertilization was first discovered by Nawaschin (1898) in [MP PMT 1997, 2003] |
| A. | Lilium and Fritillaria |
| B. | Mango and sugarcane |
| C. | Papaya and pea |
| D. | Brassica and Candytuft |
| Answer» B. Mango and sugarcane | |
| 7887. |
How much time is generally required/taken by the pine plant from pollination to fertilization [MP PMT 1995] |
| A. | Four months |
| B. | Thirteen months |
| C. | Two years |
| D. | Four years |
| Answer» C. Two years | |
| 7888. |
The size of the egg chiefly depends upon the |
| A. | Size of the animal |
| B. | Amount of yolk reserves in it |
| C. | Amount of food taken by the mother |
| D. | All the above |
| Answer» C. Amount of food taken by the mother | |
| 7889. |
What helps in the penetration of egg by the sperm [MP PMT 1992] |
| A. | Fertilizin |
| B. | Antifertilizin |
| C. | Sperm lysin |
| D. | Fertilization membrane |
| Answer» D. Fertilization membrane | |
| 7890. |
The diagram below shows a fertilized ovule and carpel Which numbers represent the structures which will become? (i) The future embryo (ii) The future testa (iii) The future micropyle of the seeds |
| A. | (i) - 5 (ii) - 3 (iii) - 1 |
| B. | (i) - 7 (ii) - 8 (iii) - 4 |
| C. | (i) - 6 (ii) - 3 (iii) - 7 |
| D. | (i) - 5 (ii) - 2 (iii) - 4 |
| Answer» E. | |
| 7891. |
The function of egg cell is/are |
| A. | It supplies a haploid set of chromosomes to the future embryo |
| B. | It provides most of the cytoplasm to the embryo |
| C. | It supplies food reserves to the embryo |
| D. | All the above |
| Answer» E. | |
| 7892. |
Which one of the following events in a botanical garden is never directly influenced by light [CPMT 1988, 93] |
| A. | Flowering |
| B. | Photosynthesis |
| C. | Transpiration |
| D. | Fertilization |
| Answer» E. | |
| 7893. |
During fertilization, which centriole of the sperm gives rise to a spindle system inside the egg |
| A. | Proximal centriole |
| B. | Distal centriole |
| C. | Ring centriole |
| D. | None of the above |
| Answer» B. Distal centriole | |
| 7894. |
The number of nuclei migrating from each of the micropylar quartet and chalazal quartet to the centre of the normal embryo sac is [AMU 1990] |
| A. | One |
| B. | Two |
| C. | Four |
| D. | Number not fixed |
| Answer» B. Two | |
| 7895. |
Amphimixis means |
| A. | Fusion of male and female gametes |
| B. | Fusion of male and female pronuclei |
| C. | Movement of the sperm towards ovum |
| D. | Movement of the ovum towards sperm |
| Answer» C. Movement of the sperm towards ovum | |
| 7896. |
A pollen tube grows down the style because [CPMT 1993; AFMC 2002] |
| A. | It helps in fertilization |
| B. | It takes nutrients from the style |
| C. | Filiform apparatus of synergids attracts the pollen tube |
| D. | Of chemical attraction |
| Answer» E. | |
| 7897. |
During the development, the point of entry of sperm in the eggs at fertilization |
| A. | Establishes the antereo-posterior axis |
| B. | Forms the centre of rotation of egg |
| C. | Forms the grey crescent |
| D. | Forms the dorsal lip of blastopore |
| Answer» B. Forms the centre of rotation of egg | |
| 7898. |
A sperm without acrosome, cannot |
| A. | Get food supply |
| B. | Move |
| C. | Penetrate into the seminal vesicle |
| D. | Penetrate into the ovum |
| Answer» E. | |
| 7899. |
Number of nuclei taking part in double fertilization is [MP PMT 1984; RPMT 1995; Kerala PMT 2004] |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 7900. |
The final event in the process of fertilization is [MP PMT 1994] |
| A. | Fusion of gametes |
| B. | Egg activation |
| C. | Amphimixis |
| D. | Organizational change in egg cytoplasm |
| Answer» D. Organizational change in egg cytoplasm | |